【题目】词语归类。从所给的词语中，选出同类词，并填在后面的横线上。
gym, go hiking, train, dancing, police officer, afraid, tomorrow
【1】worker, pilot, ________
【2】museum, bookstore, ________
【3】worried, sad, ________
【4】flying, jumping, ________
【5】see a film, take a trip, ________
【答案】
【1】police officer
【2】gym
【3】afraid
【4】dancing
【5】go hiking
【解析】
略
